I am pleased to announce that the latest version of Couchbase Server (4.6) is now compatible with macOS Sierra! From the Couchbase downloads page, choose either Couchbase Server 4.6 Enterprise Edition or Couchbase Server 4.6 Community Edition depending on your needs.
If you’re unfamiliar with some of the things that Couchbase can do, check out an article I wrote recently on some of the Couchbase Server basics called, Couchbase and the Document-Oriented NoSQL Database. For help using Couchbase, check out the Developer Portal.